Process for the production of an available phosphoric anhydrid and potash fertilizer.



ROBERT F. GABDINER, 0F CLARENDON, VIRGINIA.

PROCESS FOR THE PRODUCTION OF AN AVAILABLE PHOSPHORIC ANHYDRID AND POTASH FERTILIZER.

neeaeoa.

No Drawing.

, Specification of Letters Patent.

Patented Met. 29, rate.

(DEDICATED TO THE PUBLIC.)

To all whom it may concern:

Be it known that I, ROBERT F. GARDINER, a citizen of the United States, residing in Clarendon, Alexandria county, Virginia, (Whose post-oflice address is Department of Agriculture, Washington, D. (1,) have invented a new and useful Process for the Production of an Available Phosphoric Anhydrid and Potash Fertilizer.-

This application is made under the act of March 3, 1883, chapter 143 (22 Stat. 625), and the invention herein described and claimed may be used by the Government of the United States, or any of its ofiicers or employees, in the prosecution of work for the Government, or any person in the United States, without payment to me of any royalty thereon.

One of the objects of my invention is to utilize the calcium chlorid, which is a waste by-Iproduct in many chemical industries, in producing a fertilizing material containing available phos horic anhydrid and potash when fused wlth phosphoric anhydrid an potash bearing minerals. Another object is to utilize relatively inexpensive materials for the roduction of available phosphoric anh drid and potash by direct comparative y low temperature heat treatment, and at the same time.recover valuable distillation products from waste wood. A further object of my invention is to obtain a means of releasing valuable fertilizer elements, such" as phosphoric anhydrid. and potash, from minerals which could not be economically treated by acid extraction.

The advantages of my invention are:

"The production of a mixed fertilizer, by direct heat treatment, containing a considerable roportion of the total phosphoric anhydrid and potash'in an available condition when applied directly to the soil.

Refractory high grade phosphoric anhydrid and potash bearin minerals like apatite and orthoclase can I. e used for the roduction. of available. phosphoric anhy rid and potash.

In the practice of my invention I mix Waste calcium chlorid with finely ground dried wood waste or sawdust, and with phosphoric anhydrid and potash bearing minerals which have been ground to about 100 mesh. The mixture is then placed in a suitable retort or container and destructive distillation at a bright red heat of the wood carried on until the residue within the" retort hasbeen in a fused state or condition for about one hours time.

The distillates can be treated in the usual wa for the recovery of acetone, acetic acid and other by-products.

When a battery of retorts or containers have been cooled, the cakes or residues in them may he removed and ground to any suitable degree of fineness.

Volatilized potash can be recovered by any of the well known methods of settling chambers provided with either mechanical or electrical devices.

Having thus described my invention, I claim:

1. A process of heating a mixture of calcium chlorid, and phosphoric anhydrid and potash bearing minerals together with wood waste, like sawdust at a bright red heat to obtain a mixed fertilizer containing available phosphoric anhydrid and potash.

2. A process for producing phosphoric anhydrid and potash consistin in heating a mixture of calcium chlorid an phosphoric anhydrid and potash bearing minerals together wit wood waste, like sawdust at a bright red eat.

3. A rocess for producing phosphoric anhydri and potash fertilizer consisting in grinding phosphoric anhydrid and potash bearing minerals, mixing said ground minerals with calcium chlorid, wood waste, like sawdust and heating the mixture at a bright red heat.

In testimony whereof afix my signature in the presence of two subscribing witnesses.

ROBERT F. GARDTNER.

Witnesses:

M. S. Anonnson, Josnrn G. SMITH. 

